This is my second posting of this item to find out what it might be. It is 11" long and 7" in dia. at the open end. It is made by "United Motor Service" and has the name "Compar-O-Meter". It appears to be hand held with the rubber sealed open end placed against the lens of the headlight and the gage which reads from 0 to 1000 tells the candle power of the light. Is there anyone that agrees with me, what are your thoughts? Thank you,John.